/*
 * MIT License
 *
 * Copyright (c) 2021-2099 Oscura (xingshuang) <xingshuang_cool@163.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.github.xingshuangs.iot.protocol.rtp.model.payload;


import com.github.xingshuangs.iot.exceptions.RtpCommException;

/**
 * @author xingshuang
 */
public class H264NaluBuilder {

    private H264NaluBuilder() {
        // NOOP
    }

    public static H264NaluBase parsePackage(final byte[] data) {
        return parsePackage(data, 0);
    }

    public static H264NaluBase parsePackage(final byte[] data, final int offset) {
        H264NaluHeader header = H264NaluHeader.fromBytes(data, offset);
        switch (header.getType()) {
            case SEI:
            case SPS:
            case PPS:
            case AUD:
            case NON_IDR_SLICE:
            case IDR_SLICE:
                return H264NaluSingle.fromBytes(data, offset);
            case STAP_A:
                return H264NaluStapA.fromBytes(data, offset);
            case STAP_B:
                return H264NaluStapB.fromBytes(data, offset);
            case FU_A:
                return H264NaluFuA.fromBytes(data, offset);
            case FU_B:
                return H264NaluFuB.fromBytes(data, offset);
            case MTAP16:
                return H264NaluMtap16.fromBytes(data, offset);
            case MTAP24:
                return H264NaluMtap24.fromBytes(data, offset);
            default:
                throw new RtpCommException("unrecognized type");
        }
    }
}
